Development and Performance Evaluation of a Bidirectional Tuned Mass Damper With Rigid Body Swing and Horizontal Spring Oscillation

Abstract

Super-high-rise buildings commonly utilize tuned mass dampers (TMDs) for vibration control. However, buildings with different natural periods in two horizontal directions typically require multiple TMDs, increasing weight, and costs. In this study, a bidirectional TMD (BTMD) was developed to control vibrations simultaneously in both horizontal directions of high-rise buildings with different natural periods by independently tuning natural frequencies in both directions through rotational swing and orthogonal linear oscillation of the mass component. Numerical analyses and shaking table experiments on reduced-scale building models confirmed its effectiveness in suppressing structural responses of peak and root-mean-square acceleration and displacement. The proposed BTMD offers a cost-effective and lightweight solution for enhancing the seismic resilience of high-rise buildings with different dynamic properties in two directions.